Dear Knut,
Here's one way:
> as.vector((table(Dup) > 1)[Dup])
[1] TRUE TRUE TRUE FALSE TRUE TRUE TRUE FALSE
Someone will probably think of something cleverer.
I hope this helps,
John
--------------------------------------
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: socialsciences.mcmaster.ca/jfox/
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Knut
> Krueger
> Sent: Monday, November 19, 2018 9:42 AM
> To: r-help at r-project.org >> r-help mailing list <r-help at
r-project.org>
> Subject: [R] unique() duplicate() not what i am looking for
>
> It should be simple but i do not find the right keywords:
>
>
> Dup = c(1,2,3,4,1,2,3,5)
>
> I need 4,5 as result
>
> unique(Dup) gives me [1] 4 1 2 3 5
>
> duplicated(Dup) gives me
> [1] FALSE FALSE FALSE FALSE TRUE TRUE TRUE FALSE
>
> I need
> [1] TRUE TRUE TRUE FALSE TRUE TRUE TRUE FALSE
>
>
> Kind regards Knut
>
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